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Constructive properties of functions with variable smoothness. (English. Russian original) Zbl 0215.46303
Math. Notes 8 (1970), 718-721 (1971); translation from Mat. Zametki 8, 443-449 (1970).
MSC:
41A30 Approximation by other special function classes
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References:
[1] S. Bochner, ?Localization of best approximation,? Ann. Math. Stud.,25, 3?23 (1950). · Zbl 0039.29402
[2] G. I. Natanson, ?The use of Fourier sums to approximate functions possessing different properties in different regions of their domain of definition,? Vestnik Leningr. Un-ta, No. 19, 20?35 (1966).
[3] Yu. A. Brudnyi, ?Approximation by entire functions on a real interval and on a half-line,? Dokl. Akad. Nauk SSSR,124, No. 4, 739?742 (1959).
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